package com.heima.wemedia.gateway.filter;

import com.heima.wemedia.gateway.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import org.apache.commons.lang3.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.ArrayList;
import java.util.List;

@Component
public class WemediaFilter implements GlobalFilter {
    private static List<String> list = new ArrayList<>();
    static {
        list.add("/login/in");
        list.add("/v2/api-docs");
    }

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String path = request.getURI().getPath();
        for (String s : list) {
            if (path.contains(s)){
                return chain.filter(exchange);
            }
        }
        String token = request.getHeaders().getFirst("token");
        if (StringUtils.isBlank(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        try {
            Claims claimsBody = AppJwtUtil.getClaimsBody(token);
            int i = AppJwtUtil.verifyToken(claimsBody);
            if (i>0){
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }
            Object id = claimsBody.get("id");
            ServerHttpRequest serverHttpRequest = request.mutate().header("UserId", id.toString()).build();
            exchange.mutate().request(serverHttpRequest).build();
            return chain.filter(exchange);
        } catch (Exception e) {
            e.printStackTrace();
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

    }




}
